Nutrasweet is the brand name for the sweetener aspartame. this molecule is the ester of a dipeptide that contains the amino acids phenylalanine and aspartic acid. if aspartame is known to be 27.2% oxygen, by weight, and it has a molecular weight of 292g/mole, how many oxygen atoms must be found in each molecule of aspartame

The number of atoms of oxygen present in given amount of aspartame are

Explanation:

We are given:

27.2 % oxygen by mass

This means that 27.2 grams of oxygen is present in 100 grams of aspartame

Applying unitary method:

In 100 grams of aspartame, the mass of oxygen present is 27.2 grams

So, in 292 grams of aspartame, the mass of oxygen present will be =

To calculate the number of moles, we use the equation:

Given mass of oxygen = 79.42 g

Molar mass of oxygen = 16 g/mol

Putting values in above equation, we get:

According to mole concept:

1 mole of an element contains number of atoms

So, in 4.964 moles of oxygen will contain = number of atoms

Hence, the number of atoms of oxygen present in given amount of aspartame are

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

im pretty sure its b